DNS Latency Probes
DNS Latency for 100.64.0.1
DNS Latency for 8.8.8.8 (google-public-dns-a.google.com)
DNS Latency for 8.8.4.4 (google-public-dns-b.google.com)
DNS Latency for 1.1.1.1 (Cloudflare primary)
DNS Latency for 1.0.0.1 (Cloudflare secondary)
DNS Latency for 9.9.9.9 (dns9.quad9.net)
